Repairable gearing for looms.



H. F. LIVERMORE.

REPAIRABLE GEARING FOR LOOMS.

APPLICATION FILED NOV. 21, 1913.

1, 1 1 5,557. Patented Nov. 3, 1914.

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THE NORRIS PETERS CO.. FHOTOLITHO.. WASHING ION. llv C.

UNITED STATES PATENT oFFIoE.

HOMER F. LIVERMORE, or BROOKLINE, MASSACHUSETTS, ASSIGNQR T0 11. 12*. LIVER- MORE COMPANY, or BOSTON, MAssAcHUs rrrsA CORPORATION SETTS.

OF 'MASSAGHU I ,REPAIRABLE GEARING FOR LO OMS.

Patented Nov. 3, 1914.

Application filed November 21, 1913, Serial No. 802,288,

To all whom it may concern:

Be it known that I, HOMER F. LIVERMORE, a citizen of the United States, and a resident of Brookline, in the county of MiddleseX and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Repairable Gearing for Looms, of which the following is a full and exact description. I

This invention relates'to that class of gearing which is employed for operating both the harness-motion and the box-motion of looms of the type of what: are known as Knowles looms; and the object .of this invention is'the construction of an improved means for renewing the initial teeth or cogs both of the driving segments or drums and of the pitman-gears. In Letters Patent 674,600 granted to Chevrette, is disclosed a device for this purpose which performs the work fairly well, but is open to certain objections which my invention is designed to overcome.

Referring to the drawings forming part of this specification, Figure l is a side elevation of suflicient parts of a loom-gearing to illustrate the application of my invention thereto. Fig. 2 is a perspective view of portion of one of the gears showing the seat for the removable tooth-segment. Fig. 8 is a face view of said portion showing the tooth-segment in place thereon. Fig. i is a perspective View of the tooth-segment alone. Fig. 5 is a sectional edge view of the said gear-portion.

In Fig. 1, the reference letters A and C designate the oppositely revolving driving sectors or drums. Extending between said drums are the free ends of a series of pivoted levers D, each one'of which is provided with a pitman-gear E, connected by a link F to operate a harness-jack, as G, or in other cases to operate the box-motion of the loom, as the case may be. These parts may be of the ordinary or approved construction, such as are now employed in the Knowles loom, except that there are certain differences such as are disclosed in said patent to Chevrette. As set forth in said patent, the initial teeth 1, that is, the teeth which take the shock of the reversals of rotation, are formed upon a plate or segment 2 which is removably fastened to the gear E, by a rivet 3. I have found that said rivet wears loose after a time and so permits thatthe segment rests solidlyupon the seat the segment to lean laterally and the teeth to fail of proper action. To prevent this, the segment 2 is formed with shoulders 4 (Fig. 4) additional to the shoulder 5,. so

7 instead of partially upon the rivet. The inner portion 9 of the segment, that throughwhich the rivet is passed, is half the thickness of the toothed portion, one surface vof the latter being flush with one surface of the portion 9. To the surface ofthe portion opposite to said flush surface is fastened, preferably by electric welding. a thin strip of sheet metal 11 having teeth 12 coinciding with said teeth 1. This strip or plate 11 is elongated and formed with an additional tooth 13 near each end disposed for cooperating with the corresponding teeth of the gear E. In applymg this segment to the gear E, the portion or car 9 slides radially into the seat-portion l4: and the plate 11 passes down beside the opposite surface of the gear so that the latter is embraced between said parts. The rivet 3 is then inserted, and the segment is fixed in position. As is evident, the segment cannot swing away from the gear in either direction, even should the rivet be slightly loose, since the contact of the upper part of the ear 9 with the edge of the seat-portion lt prevents a swing in the one direction, and the contact of the plate 11 with the surface of the gear and teeth thereat prevents the swing of the segment toward the opposite surface.

-While theoretically it is not necessary to elongate the strip or plate 11 so far as to faces. The value in this lies in the fact that the hardest wear comes upon the teeth 1 and those immediately adjacent thereto, since the same are the ones which receive the shocks of the reversals of the gears.

What I claim for my invention and for which I desire Letters Patent is as follows, to wit i i 1. The combination with the pitman gear of a loom having separated sections of teeth and "a recess 01' seat between adjacent ends of the toothed sections, of a segmenthaving the two initial teeth of said sections and fitted in said seat, said seat being mainly in one flat face of said gear, and an elongated plate fixed to the segment in contact with elongated plate fixed to the segment in contact with the surface of the gear opposite to that containing said seat, said plate be ing formed With teeth coacting With the corresponding teeth of the gear and segment, and serving both to fasten the segment to thegear and to reinforce the initial teeth.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 17 day of November, 1913.

I HOMER F. LIVERMORE.

Vitnesses.

LEON A. SMITH, F. E. BABCOOK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, 13.0. 

